| article html file updated | 6 February 2020 01:08 CET | Update | https://www.mdpi.com/1424-8247/6/3/393 |
| article html file updated | 8 May 2019 07:04 CEST | Update | N/A |
| article html file updated | 20 March 2019 20:06 CET | Update | N/A |
| article html file updated | 17 June 2015 07:47 CEST | Update | N/A |
| article html file updated | 13 September 2013 17:18 CEST | Original file | N/A |
| article xml file uploaded | 13 September 2013 17:18 CEST | Original file | https://www.mdpi.com/1424-8247/6/3/393/xml |
| article pdf uploaded. | 22 March 2013 14:00 CET | Updated version of record | https://www.mdpi.com/1424-8247/6/3/393/pdf |
| article pdf uploaded. | 21 March 2013 14:02 CET | Version of Record | https://www.mdpi.com/1424-8247/6/3/393/pdf-vor |
